Karur vs Katihar
Side-by-side air quality comparison between Karur and Katihar.
Live AQI from Open-Meteo CAMS (~45 km global model, updated hourly). Multi-year history from CPCB station data via aqinow.co pipeline (2016–2024, station-level daily records).
AQI Comparison
Pollutant-level comparison (PM2.5, PM10, O3, NO2, SO2, CO)▾
| Pollutant | Karur | Katihar |
|---|---|---|
| PM2.5(µg/m³) | 3.80 | 109.20 |
| PM10(µg/m³) | 4.40 | 114.30 |
| NO₂(µg/m³) | 7.30 | 31.10 |
| SO₂(µg/m³) | 2.70 | 18.30 |
| O₃(µg/m³) | 37.00 | 43.00 |
| CO(µg/m³) | 117.00 | 770.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Karur averaged an AQI of 71 while Katihar averaged 123 — a 52-point (73%) gap, with Katihar the more polluted and Karur the cleaner of the two. On 59 days when both cities reported, Karur was cleaner on 58 of them; the average daily gap was 100 AQI points.
Seasonality & days
Both cities see their worst air in December on average. Karur logged 0% Severe days and 80.3% Good-or-Satisfactory days; Katihar was 3.1% Severe and 26.9% Good-or-Satisfactory. Longest clean-air streaks: Karur 34 days, Katihar 19 days.
Year-over-year progress
The worst recorded day for Karur reached AQI 149 at Kamadenu Nagar (TNPCB) on 2024-11-26; Katihar hit AQI 465 at Mirchaibari (BSPCB) on 2023-01-23.
Station-level disparity
Karur spans 1 CPCB stations with a 0-point spread (min 71, max 71); Katihar spans 1 stations with a 0-point spread (min 185, max 185).
Verdict
🏆 Karur has better air quality with an AQI of 6 compared to Katihar's 264. That's a significant difference of 258 points.